/**
 * $Revision$
 * $Date$
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jivesoftware.smackx.workgroup.packet;

import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smack.provider.PacketExtensionProvider;
import org.xmlpull.v1.XmlPullParser;

/**
 * A packet extension that contains information about the user and agent in a
 * workgroup chat. The packet extension is attached to group chat invitations.
 */
public class WorkgroupInformation implements PacketExtension {

	/**
	 * Element name of the packet extension.
	 */
	public static final String ELEMENT_NAME = "workgroup";

	/**
	 * Namespace of the packet extension.
	 */
	public static final String NAMESPACE = "http://jabber.org/protocol/workgroup";

	private String workgroupJID;

	public WorkgroupInformation(String workgroupJID) {
		this.workgroupJID = workgroupJID;
	}

	public String getWorkgroupJID() {
		return workgroupJID;
	}

	public String getElementName() {
		return ELEMENT_NAME;
	}

	public String getNamespace() {
		return NAMESPACE;
	}

	public String toXML() {
		StringBuilder buf = new StringBuilder();

		buf.append('<').append(ELEMENT_NAME);
		buf.append(" jid=\"").append(getWorkgroupJID()).append("\"");
		buf.append(" xmlns=\"").append(NAMESPACE).append("\" />");

		return buf.toString();
	}

	public static class Provider implements PacketExtensionProvider {

		/**
		 * PacketExtensionProvider implementation
		 */
		public PacketExtension parseExtension(XmlPullParser parser)
				throws Exception {
			String workgroupJID = parser.getAttributeValue("", "jid");

			// since this is a start and end tag, and we arrive on the start,
			// this should guarantee
			// we leave on the end
			parser.next();

			return new WorkgroupInformation(workgroupJID);
		}
	}
}